Improvement in preserving-jars



. UNITED STATES.

PATENT OFFICE.

J. BORDEN, OFBRIDGETON, NEW JERSEY, ASSIGNOR TO DAVID POTTER AND FRANCISL. BODINE.

IMPROVEMENT IN PRESERVING-JARS.

lSpecification forming part of Letters Patent No. 19,964, dated April13, 1858.

.To all whom. it may concern.-

kBe it known that I, JOSEPH BoRDEN, of Bridgeton, Cumberland county, inthe State of New Jersey, have invented a new and Improved Preserving-Jar, designed for hermetically sealing fruits, vegetables, Src., whichare intended to be protected from the action of atmospheric air. Thefollowing is a full, clear, and exact description, reference being lhadAto the accompanying drawings, forming part of this specification, inwhich* j Figure l represents a perspective view of v the jar in anunnished state, with a pro- 'jecting hollow bead around the neck. Fig. 2represents a perspective view of the jar when nished. Fig. 3 representsa vertical section of Fig. 1. Fig. 4 represents a verticalsection ofFig. 2.

My improvements in preservingjars relate more especially to those madeof glass, and to that class in which a groove or recess is formed on theoutside to hold the cementing ymaterial by which the cap or cover ishermetically sealed to the jar.

Her'etoforc the groove has been formed by making a vertical depressionin the top of the jar, or by Welding to the ncck or wall of the jar anannular cup-shaped flange to receive'the cement. The objection toforming the groove in the top of the jar is that a correspondingprojection is produced on the interior, which leaves a cavity betweenthis projection and the wall of the jar, from which it is next toimpossible to expel the air. Thus the jar is rendered defective for thepurpose to which it is applied.

Y The second inode of forming the groove is objectionable 4from thenecessity of making the cup so thick and heavy that it may havesufficient strength to resist blows, while this very thickness rendersthe jar more liable tov crack when heated. The jaws are more expensivethan those first named, from the additional amount of material requiredto make them, and from the increasedcost of their manufacture by reasonAof the secondary pro- .cess they pass through to attach the lip.

The object of' my improvement in preserving jars' is to overcome thebefore-mentioned den @sand/.produce a better and cheaperv article,that'i'cr be afforded to t "e trade at less cost; and myinventionconsist-sin the met-hodlby which the groove for holding thecement is formed around the neck or body of the jar, and this methodconsists in blowing the jarwith an exterior hollow head or projectionsurrounding either the neck or body at the point at which the groove isto be formed, and then, while the jar is in a plastic state, uniting thewalls of the projections, so as to convert it into an external annulargroove.

By reference to the accompanying drawings the manner in'which the'groove isformed will be more clearly understood.

The glass jar is blown in a mold in which there is lan annular groovenear its top, by which an annular rounded and hollow projection, .C C,is formed around the neck of the jar. Vhile the jar is in the mold,or,as soon as it is removed therefrom, and while it is in a hot andplastic condition, pressure is applied to the top a of the jar and thering C by means of a former, which embraces the neck of thev jar andenters the'mouth, and as the ring is thinner than the wallsofvthe jar ityields under the pressure, the top ofthe jar above the ring sinks, andthe interior edges of the groove are brought -in contact and united,leaving the interior of the neck smooth, so as to allow for escape tothe air. Thel upper wall, a', is also depressed, brought in contact, andunites to the lower wall, a, thus forming an annular groove, d, aroundthe neck of the jar, and at the saineptime the mouth of the jar isrounded and inis'hed smooth by the pressure ofthe former. As the ring CC is only about halt' the thickness of the jar, the cup which it formswhen its walls are brought together is about the same thickness as thewall of the jar. Thus this jar, with its exterior cup, b, is much lessliable'to-crack when heated than those in which the cup is welded Vtothe exterior, as has heretofore been the practice.

The exterior cup may be made by blowing the jar with a flanged mouthwith a raised edge, and thc groove is formed by sinking the flange by aformer down and around the outside of the mouth of the jar, the flangeforming the inner and bottom wall of the groove ,and the raised edge theouter wall.

The facility with which these jars une lnanfor holding the cement isformed on the exJ ufactured enables 111e to afford to the con teriorfromthe wall of the jar by the method -sumer a. better and cheaperarticle than has herein described.

Vlhsiio'gSie. been produced at a greatly-dlmln- JOSEPH RO'RDEN' What Iclaim as an article of manufacture, \Vit11esses: and desire to secure byLetters Patent, is JOHN ROBINSON,

A preserving-jar in which the cup or groove CLEMT. B. MCCARTHY.

